Staggertooth blade produces faster feeding and optimized blending. Crunch blade provides smoother cutting experience with audible feedback. ERGONOMIC Lighter weight and cordless design for easier handling with the great haircutting quality of a Wahl corded clipper. PROFESSIONAL Highly efficient and durable Lithium-Ion battery without memory effect. 90 minutes run time and 120 minutes charging time. Includes 8 attachment combs.